diff --git a/index.ts b/index.ts
index b1b66a0..690c02f 100644
--- a/index.ts
+++ b/index.ts
@@ -16,9 +16,12 @@
  * @exports CEF
  * @module SyslogPro
  */
+import EventEmitter from 'events';
 import moment from 'moment';
-import * as os from 'os';
+import * as dgram from 'dgram'; // eslint-disable-line no-unused-vars
 import * as dns from 'dns';
+import * as net from 'net'; // eslint-disable-line no-unused-vars
+import * as os from 'os';
 import * as tls from 'tls'; // eslint-disable-line no-unused-vars
 let dnsPromises = dns.promises;
 
@@ -114,7 +117,7 @@ type SyslogOptions = {
  * @version 0.0.0
  * @since 0.0.0
  */
-export class Syslog {
+export class Syslog extends EventEmitter {
   cef: any;
   format: string;
   leef: any;
@@ -124,10 +127,13 @@ export class Syslog {
   rfc3164: any;
   rfc5424: any;
   target: string;
+  tcpSocketPromise: Promise<net.Socket> | null;
   tcpTimeout: number;
   tlsServerCerts: (Buffer | string)[];
   tlsClientCert: Buffer | string;
   tlsClientKey: Buffer | string;
+  tlsSocketPromise: Promise<tls.TLSSocket> | null;
+  udpSocketPromise: Promise<dgram.Socket> | null;
   /**
    * Construct a new Syslog transport object with user options
    * @public
@@ -171,6 +177,7 @@ export class Syslog {
    *    (Common Event Format) formatting object}
    */
   constructor(options?: SyslogOptions) {
+    super();
     if (!options) {
       options = {};
     }
@@ -181,7 +188,21 @@ export class Syslog {
     this.protocol = options.protocol || 'udp';
     this.protocol = this.protocol.toLowerCase();
     /** @type {number} */
-    this.port = options.port || 514;
+    this.port = options.port;
+    if (!this.port) {
+      // defaut port defined on https://tools.ietf.org/html/rfc3195
+      // and https://tools.ietf.org/html/rfc5425
+      if (this.protocol === 'udp') {
+        this.port = 514;
+      } else if (this.protocol === 'tcp') {
+        this.port = 601;
+      } else {
+        this.port = 6514;
+      }
+    }
+    this.tcpSocketPromise = null;
+    this.tlsSocketPromise = null;
+    this.udpSocketPromise = null;
     /** @type {number} */
     this.tcpTimeout = options.tcpTimeout || 10000;
     if (Array.isArray(options.tlsServerCerts)
@@ -286,6 +307,23 @@ export class Syslog {
    * @throws {Error} - Network Error
    */
   async udpMessage(msg) {
+    if (!this.udpSocketPromise) {
+      this.udpSocketPromise = this.udpConnect();
+    }
+    const socket = await this.udpSocketPromise;
+    return new Promise((resolve, reject) => {
+      // @ts-ignore
+      socket.send(msg, (err) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(msg);
+        }
+      });
+    });
+  }
+
+  async udpConnect(): Promise<dgram.Socket> {
     // Test for target DNS and Address Family (IPv4/6) by looking up the DNS
     const dgram = require('dgram');
     const dnsOptions = {
@@ -293,16 +331,24 @@ export class Syslog {
     };
     const result = await dnsPromises.lookup(this.target, dnsOptions);
     const udpType = result.family === 4 ? 'udp4' : 'udp6';
-    let client = dgram.createSocket(udpType);
-    // Turn msg in to a UTF8 buffer
-    let msgBuffer = Buffer.from(msg, 'utf8');
-    return new Promise((resolve) => {
-      client.send(msgBuffer, this.port, this.target, () => {
-        client.close();
-        resolve(msg);
+    const socket = dgram.createSocket(udpType);
+    socket.on('close', () => {
+      this.onClose();
+    });
+    socket.on('error', (error) => {
+      this.emit('error', error);
+    });
+    return new Promise((resolve, reject) => {
+      socket.connect(this.port, this.target, (err) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(socket);
+        }
       });
     });
   }
+
   /**
    * Send the Syslog message over TCP
    * @private
@@ -312,38 +358,76 @@ export class Syslog {
    * @throws {Error} - Network Error
    */
   async tcpMessage(msg) {
+    if (!this.tcpSocketPromise) {
+      this.tcpSocketPromise = this.tcpConnect();
+    }
+    const socket = await this.tcpSocketPromise;
+    this.tcpSocketPromise = Promise.resolve(socket);
+    return new Promise((resolve, reject) => {
+      const removeListeners = () => {
+        socket.off('error', onceError);
+        socket.off('timeout', onceTimeout);
+      };
+      const onceError = (error) => {
+        removeListeners();
+        reject(error);
+      };
+      const onceTimeout = () => {
+        removeListeners();
+        reject(new Error('TIMEOUT ERROR: Syslog server TCP timeout'));
+      };
+      socket.write(msg, () => {
+        removeListeners();
+        resolve(msg);
+      });
+      socket.once('error', onceError);
+      socket.once('timeout', onceTimeout);
+    });
+  }
+
+  async tcpConnect(): Promise<net.Socket> {
     const net = require('net');
-    const dnsOptions = {
-      verbatim: true,
-    };
-    const result = await dnsPromises.lookup(this.target, dnsOptions);
     const tcpOptions = {
       host: this.target,
       port: this.port,
-      family: result.family,
     };
-    const client = net.createConnection(tcpOptions, () => {
-      // Turn msg in to a UTF8 buffer
-      let msgBuffer = Buffer.from(msg, 'utf8');
-      client.write(msgBuffer, () => {
-        client.end();
-      });
-    });
-    client.setTimeout(this.tcpTimeout);
     return new Promise((resolve, reject) => {
-      client.on('end', () => {
-        resolve(msg);
-      });
-      client.on('timeout', () => {
-        client.end();
-        reject(new Error('TIMEOUT ERROR: Syslog server TCP timeout'));
-      });
-      client.on('error', (error) => {
-        client.destroy();
+      const removeListeners = () => {
+        socket.off('error', onceError);
+        socket.off('timeout', onceTimeout);
+      };
+      const onceError = (error) => {
+        removeListeners();
         reject(error);
+      };
+      const onceTimeout = () => {
+        removeListeners();
+        reject(new Error('TIMEOUT ERROR: Syslog server TCP timeout'));
+      };
+      const socket = net.connect(tcpOptions, () => {
+        removeListeners();
+        resolve(socket);
+      });
+      socket.setTimeout(this.tcpTimeout);
+      socket.once('error', onceError);
+      socket.once('timeout', onceTimeout);
+      socket.on('close', () => {
+        this.onClose();
+      });
+      socket.on('end', () => {
+        this.emit('end');
+      });
+      socket.on('error', (error) => {
+        socket.destroy();
+        this.emit('error', error);
+      });
+      socket.on('timeout', () => {
+        socket.end();
+        this.emit('timeout');
       });
     });
   }
+
   /**
    * Send the Syslog message over TLS
    * @private
@@ -353,6 +437,34 @@ export class Syslog {
    * @throws {Error} - Network Error
    */
   async tlsMessage(msg) {
+    if (!this.tlsSocketPromise) {
+      this.tlsSocketPromise = this.tlsConnect();
+    }
+    const socket = await this.tlsSocketPromise;
+    this.tlsSocketPromise = Promise.resolve(socket);
+    return new Promise((resolve, reject) => {
+      const removeListeners = () => {
+        socket.off('error', onceError);
+        socket.off('timeout', onceTimeout);
+      };
+      const onceError = (error) => {
+        removeListeners();
+        reject(error);
+      };
+      const onceTimeout = () => {
+        removeListeners();
+        reject(new Error('TIMEOUT ERROR: Syslog server TLS timeout'));
+      };
+      socket.write(msg, () => {
+        removeListeners();
+        resolve(msg);
+      });
+      socket.once('error', onceError);
+      socket.once('timeout', onceTimeout);
+    });
+  }
+
+  async tlsConnect(): Promise<tls.TLSSocket> {
     const tls = require('tls');
     const tlsOptions: tls.ConnectionOptions = {
       host: this.target,
@@ -390,25 +502,39 @@ export class Syslog {
       tlsOptions.ca = tlsOptionsCerts;
     }
     tlsOptions.rejectUnauthorized = this.rejectUnauthorized;
-    const client = tls.connect(tlsOptions, () => {
-      // Turn msg in to a UTF8 buffer
-      let msgBuffer = Buffer.from(msg, 'utf8');
-      client.write(msgBuffer, () => {
-        client.end();
-      });
-    });
-    client.setTimeout(this.tcpTimeout);
     return new Promise((resolve, reject) => {
-      client.on('end', () => {
-        resolve(msg);
-      });
-      client.on('timeout', () => {
-        client.end();
-        reject(new Error('TIMEOUT ERROR: Syslog server TLS timeout'));
-      });
-      client.on('error', (error) => {
-        client.destroy();
+      const removeListeners = () => {
+        socket.off('error', onceError);
+        socket.off('timeout', onceTimeout);
+      };
+      const onceError = (error) => {
+        removeListeners();
         reject(error);
+      };
+      const onceTimeout = () => {
+        removeListeners();
+        reject(new Error('TIMEOUT ERROR: Syslog server TLS timeout'));
+      };
+      const socket = tls.connect(tlsOptions, () => {
+        removeListeners();
+        resolve(socket);
+      });
+      socket.setTimeout(this.tcpTimeout);
+      socket.once('error', onceError);
+      socket.once('timeout', onceTimeout);
+      socket.on('close', () => {
+        this.onClose();
+      });
+      socket.on('end', () => {
+        this.emit('end');
+      });
+      socket.on('error', (error) => {
+        socket.destroy();
+        this.emit('error', error);
+      });
+      socket.on('timeout', () => {
+        socket.end();
+        this.emit('timeout');
       });
     });
   }
@@ -425,7 +551,6 @@ export class Syslog {
     if (typeof msg !== 'string') {
       throw new Error('TYPE ERROR: Syslog message must be a string');
     }
-    this.protocol = this.protocol.toLowerCase();
     if (this.protocol === 'udp') {
       return this.udpMessage(msg);
     } else if (this.protocol === 'tcp') {
@@ -438,12 +563,68 @@ export class Syslog {
       throw new Error(errorMsg);
     }
   }
+
+  async close() {
+    if (this.tcpSocketPromise) {
+      let socket;
+      try {
+        socket = await this.tcpSocketPromise;
+      } catch (err) {
+        this.tcpSocketPromise = null;
+        return;
+      }
+      return new Promise((resolve) => {
+        socket.end(resolve);
+      });
+    }
+
+    if (this.tlsSocketPromise) {
+      let socket;
+      try {
+        socket = await this.tlsSocketPromise;
+      } catch (err) {
+        this.tlsSocketPromise = null;
+        return;
+      }
+      return new Promise((resolve) => {
+        socket.end(resolve);
+      });
+    }
+
+    if (this.udpSocketPromise) {
+      let socket;
+      try {
+        socket = await this.udpSocketPromise;
+      } catch (err) {
+        this.udpSocketPromise = null;
+        return;
+      }
+      return new Promise((resolve) => {
+        socket.close(resolve);
+      });
+    }
+  }
+
+  async onClose() {
+    this.tcpSocketPromise = null;
+    this.tlsSocketPromise = null;
+    this.udpSocketPromise = null;
+    this.emit('close');
+  }
+}
+
+abstract class Format {
+  server: Syslog;
+
+  async close() {
+    return this.server.close();
+  }
 }
 
 /**
  * The base class of RFC formartted syslog messages.
  */
-export class RFC {
+abstract class RFC extends Format {
   alertColor: number;
   criticalColor: number;
   emergencyColor: number;
@@ -616,7 +797,6 @@ export class RFC3164 extends RFC {
   color: boolean;
   facility: number;
   hostname: string;
-  server: Syslog;
   /**
    * Construct a new RFC3164 formatted Syslog object with user options
    * @public
@@ -678,13 +858,11 @@ export class RFC3164 extends RFC {
     } else {
       this.extendedColor = false;
     }
-    if (options.server) {
-      if (options.server instanceof Syslog) {
-        /** @private @type {Syslog} */
-        this.server = options.server;
-      } else {
-        this.server = new Syslog(options.server);
-      }
+    if (options.server instanceof Syslog) {
+      /** @private @type {Syslog} */
+      this.server = options.server;
+    } else {
+      this.server = new Syslog(options.server);
     }
     if (this.extendedColor) {
       /** @private @type {number} */
@@ -796,9 +974,6 @@ export class RFC3164 extends RFC {
    * @throws {Error} A standard error object
    */
   async send(msg, options) {
-    if (!this.server) {
-      this.server = new Syslog();
-    }
     const result = this.buildMessage(msg, options);
     return this.server.send(result);
   }
@@ -1024,7 +1199,6 @@ export class RFC5424 extends RFC {
   applicationName: string;
   color: boolean;
   hostname: string;
-  server: Syslog;
   timestamp: boolean;
   timestampMS: boolean;
   timestampTZ: boolean;
@@ -1105,13 +1279,11 @@ export class RFC5424 extends RFC {
     } else {
       this.extendedColor = false;
     }
-    if (options.server) {
-      if (options.server instanceof Syslog) {
-        /** @private @type {Syslog} */
-        this.server = options.server;
-      } else {
-        this.server = new Syslog(options.server);
-      }
+    if (options.server instanceof Syslog) {
+      /** @private @type {Syslog} */
+      this.server = options.server;
+    } else {
+      this.server = new Syslog(options.server);
     }
     if (this.extendedColor) {
       /** @private @type {number} */
@@ -1301,9 +1473,6 @@ export class RFC5424 extends RFC {
    * @throws {Error} A standard error object
    */
   async send(msg, options) {
-    if (!this.server) {
-      this.server = new Syslog();
-    }
     const result = this.buildMessage(msg, options);
     return this.server.send(result);
   }
@@ -1511,11 +1680,10 @@ type LEEFOptions = {
  * @version 0.0.0
  * @since 0.0.0
  */
-export class LEEF {
+export class LEEF extends Format {
   attributes: any;
   eventId: string;
   product: string;
-  server: Syslog;
   syslogHeader: boolean;
   vendor: string;
   version: string;
@@ -1541,6 +1709,7 @@ export class LEEF {
    *    from this class. @see SyslogPro~Syslog
    */
   constructor(options?: LEEFOptions) {
+    super();
     options = options || {};
     /** @type {string} */
     this.vendor = options.vendor || 'unknown';
@@ -1602,13 +1771,11 @@ export class LEEF {
       AttributeLimits: null,
       calCountryOrRegion: null,
     };
-    if (options.server) {
-      if (options.server instanceof Syslog) {
-        /** @private @type {Syslog} */
-        this.server = options.server;
-      } else {
-        this.server = new Syslog(options.server);
-      }
+    if (options.server instanceof Syslog) {
+      /** @private @type {Syslog} */
+      this.server = options.server;
+    } else {
+      this.server = new Syslog(options.server);
     }
   }
   /**
@@ -1638,15 +1805,9 @@ export class LEEF {
 
   /**
    * @public
-   * @param {Syslog} [options=false] - A {@link module:SyslogPro~Syslog|
-   *    Syslog server connection} that should be used to send messages directly
-   *    from this class. @see SyslogPro~Syslog
    */
   async send(options) {
     const result = this.buildMessage();
-    if (!this.server) {
-      this.server = new Syslog(options);
-    }
     return this.server.send(result);
   }
 }
@@ -1677,14 +1838,13 @@ type CEFOptions = {
  * @version 0.0.0
  * @since 0.0.0
  */
-export class CEF {
+export class CEF extends Format {
   deviceEventClassId: string;
   deviceProduct: string;
   deviceVendor: string;
   deviceVersion: string;
   extensions: any;
   name: string;
-  server: Syslog;
   severity: string;
   /**
    * Construct a new CEF formatting object with user options
@@ -1707,6 +1867,7 @@ export class CEF {
    *    from this class. @see SyslogPro~Syslog
    */
   constructor(options?: CEFOptions) {
+    super();
     options = options || {};
     /** @type {string} */
     this.deviceVendor = options.deviceVendor || 'Unknown';
@@ -1880,13 +2041,11 @@ export class CEF {
       sourceZoneExternalID: null,
       sourceZoneURI: null,
     };
-    if (options.server) {
-      if (options.server instanceof Syslog) {
-        /** @private @type {Syslog} */
-        this.server = options.server;
-      } else {
-        this.server = new Syslog(options.server as SyslogOptions);
-      }
+    if (options.server instanceof Syslog) {
+      /** @private @type {Syslog} */
+      this.server = options.server;
+    } else {
+      this.server = new Syslog(options.server as SyslogOptions);
     }
   }
   /**
@@ -3144,15 +3303,9 @@ export class CEF {
   }
   /**
    * @public
-   * @param {Syslog} [options=false] - A {@link module:SyslogPro~Syslog|
-   *    Syslog server connection} that should be used to send messages directly
-   *    from this class. @see SyslogPro~Syslog
    */
-  async send(options) {
+  async send() {
     const result = this.buildMessage();
-    if (!this.server) {
-      this.server = new Syslog(options);
-    }
     return this.server.send(result);
   }
 }
diff --git a/package-lock.json b/package-lock.json
index d94cb73..728f7e2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@zeit/syslog-pro",
-  "version": "0.2.0",
+  "version": "0.2.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -167,9 +167,9 @@
       }
     },
     "abab": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.0.tgz",
-      "integrity": "sha512-sY5AXXVZv4Y1VACTtR11UJCPHHudgY5i26Qj5TypE6DKlIApbwb5uqhXcJ5UUGbvZNRh7EeIoW+LrJumBsKp7w==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.2.tgz",
+      "integrity": "sha512-2scffjvioEmNz0OyDSLGWDfKCVwaKc6l9Pm9kOIREU13ClXZvHpg/nRL5xyjSSSLhOnXqft2HpsAzNEEA8cFFg==",
       "dev": true
     },
     "acorn": {
@@ -179,9 +179,9 @@
       "dev": true
     },
     "acorn-globals": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.3.0.tgz",
-      "integrity": "sha512-hMtHj3s5RnuhvHPowpBYvJVj3rAar82JiDQHvGs1zO0l10ocX/xEdBShNHTJaboucJUsScghp74pH3s7EnHHQw==",
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.3.4.tgz",
+      "integrity": "sha512-clfQEh21R+D0leSbUdWf3OcfqyaCSAQ8Ryq00bofSekfr9W8u1jyYZo6ir0xu9Gtcf7BjcHJpnbZH7JOCpP60A==",
       "dev": true,
       "requires": {
         "acorn": "^6.0.1",
@@ -189,9 +189,9 @@
       },
       "dependencies": {
         "acorn": {
-          "version": "6.0.1",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.1.tgz",
-          "integrity": "sha512-SiwgrRuRD2D1R6qjwwoopKcCTkmmIWjy1M15Wv+Nk/7VUsBad4P8GOPft2t6coDZG0TuR5dq9o1v0g8wo7F6+A==",
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
           "dev": true
         }
       }
@@ -206,9 +206,9 @@
       }
     },
     "acorn-walk": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.0.1.tgz",
-      "integrity": "sha512-PqVQ8c6a3kyqdsUZlC7nljp3FFuxipBRHKu+7C1h8QygBFlzTaDX5HD383jej3Peed+1aDG8HwkfB1Z1HMNPkw==",
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.2.0.tgz",
+      "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==",
       "dev": true
     },
     "ajv": {
@@ -673,9 +673,9 @@
       }
     },
     "async-limiter": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
-      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg==",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
+      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==",
       "dev": true
     },
     "asynckit": {
@@ -721,7 +721,7 @@
         },
         "chalk": {
           "version": "1.1.3",
-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
@@ -823,7 +823,7 @@
     },
     "babel-plugin-istanbul": {
       "version": "4.1.6",
-      "resolved": "http://registry.npmjs.org/babel-plugin-istanbul/-/babel-plugin-istanbul-4.1.6.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-istanbul/-/babel-plugin-istanbul-4.1.6.tgz",
       "integrity": "sha512-PWP9FQ1AhZhS01T/4qLSKoHGY/xvkZdVBGlKM/HuxxS3+sC66HhTNR7+MpbO/so/cz/wY94MeSWJuP1hXIPfwQ==",
       "dev": true,
       "requires": {
@@ -841,7 +841,7 @@
     },
     "babel-plugin-syntax-object-rest-spread": {
       "version": "6.13.0",
-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
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       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.3.0.tgz",
@@ -5032,9 +5184,9 @@
       "dev": true
     },
     "process-nextick-args": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.0.tgz",
-      "integrity": "sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
       "dev": true
     },
     "progress": {
@@ -5053,18 +5205,22 @@
         "sisteransi": "^0.1.1"
       }
     },
-    "pseudomap": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
-      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
-      "dev": true
-    },
     "psl": {
       "version": "1.1.29",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.29.tgz",
       "integrity": "sha512-AeUmQ0oLN02flVHXWh9sSJF7mcdFq0ppid/JkErufc3hGIV/AMa8Fo9VgDo/cT2jFdOWoFvHp90qqBH54W+gjQ==",
       "dev": true
     },
+    "pump": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+      "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+      "dev": true,
+      "requires": {
+        "end-of-stream": "^1.1.0",
+        "once": "^1.3.1"
+      }
+    },
     "punycode": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
@@ -5078,9 +5234,9 @@
       "dev": true
     },
     "randomatic": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/randomatic/-/randomatic-3.1.0.tgz",
-      "integrity": "sha512-KnGPVE0lo2WoXxIZ7cPR8YBpiol4gsSuOwDSg410oHh80ZMp5EiypNqL2K4Z77vJn6lB5rap7IkAmcUlalcnBQ==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/randomatic/-/randomatic-3.1.1.tgz",
+      "integrity": "sha512-TuDE5KxZ0J461RVjrJZCJc+J+zCkTb1MbH9AQUq68sMhOMcy9jLcb3BrZKgp9q9Ncltdg4QVqWrH02W2EFFVYw==",
       "dev": true,
       "requires": {
         "is-number": "^4.0.0",
@@ -5146,7 +5302,7 @@
     },
     "readable-stream": {
       "version": "2.3.6",
-      "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
       "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
       "dev": true,
       "requires": {
@@ -5160,9 +5316,9 @@
       }
     },
     "realpath-native": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/realpath-native/-/realpath-native-1.0.2.tgz",
-      "integrity": "sha512-+S3zTvVt9yTntFrBpm7TQmQ3tzpCrnA1a/y+3cUHAc9ZR6aIjG0WNLR+Rj79QpJktY+VeW/TQtFlQ1bzsehI8g==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/realpath-native/-/realpath-native-1.1.0.tgz",
+      "integrity": "sha512-wlgPA6cCIIg9gKz0fgAPjnzh4yR/LnXovwuo9hvyGvx3h8nX4+/iLZplfUWasXpqD8BdnGnP5njOFjkUwPzvjA==",
       "dev": true,
       "requires": {
         "util.promisify": "^1.0.0"
@@ -5327,23 +5483,23 @@
       }
     },
     "request-promise-core": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.1.tgz",
-      "integrity": "sha1-Pu4AssWqgyOc+wTFcA2jb4HNCLY=",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.2.tgz",
+      "integrity": "sha512-UHYyq1MO8GsefGEt7EprS8UrXsm1TxEvFUX1IMTuSLU2Rh7fTIdFtl8xD7JiEYiWU2dl+NYAjCTksTehQUxPag==",
       "dev": true,
       "requires": {
-        "lodash": "^4.13.1"
+        "lodash": "^4.17.11"
       }
     },
     "request-promise-native": {
-      "version": "1.0.5",
-      "resolved": "https://registry.npmjs.org/request-promise-native/-/request-promise-native-1.0.5.tgz",
-      "integrity": "sha1-UoF3D2jgyXGeUWP9P6tIIhX0/aU=",
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/request-promise-native/-/request-promise-native-1.0.7.tgz",
+      "integrity": "sha512-rIMnbBdgNViL37nZ1b3L/VfPOpSi0TqVDQPAvO6U14lMzOLrt5nilxCQqtDKhZeDiW0/hkCXGoQjhgJd/tCh6w==",
       "dev": true,
       "requires": {
-        "request-promise-core": "1.1.1",
-        "stealthy-require": "^1.1.0",
-        "tough-cookie": ">=2.3.3"
+        "request-promise-core": "1.1.2",
+        "stealthy-require": "^1.1.1",
+        "tough-cookie": "^2.3.3"
       }
     },
     "require-directory": {
@@ -5394,10 +5550,13 @@
       }
     },
     "resolve": {
-      "version": "1.1.7",
-      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
-      "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
-      "dev": true
+      "version": "1.12.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.12.0.tgz",
+      "integrity": "sha512-B/dOmuoAik5bKcD6s6nXDCjzUKnaDvdkRyAk6rsmsKLipWj4797iothd7jmmUhWTfinVMU+wc56rYKsit2Qy4w==",
+      "dev": true,
+      "requires": {
+        "path-parse": "^1.0.6"
+      }
     },
     "resolve-cwd": {
       "version": "2.0.0",
@@ -5808,9 +5967,9 @@
       "dev": true
     },
     "set-value": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.0.tgz",
-      "integrity": "sha512-hw0yxk9GT/Hr5yJEYnHNKYXkIA8mVJgd9ditYZCe16ZczcaELYYcfvaXesNACk2O8O0nTiPQcQhGUQj8JLzeeg==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.1.tgz",
+      "integrity": "sha512-JxHc1weCN68wRY0fhCoXpyK55m/XPHafOmK4UWD7m2CI14GMcFypt4w/0+NV5f/ZMby2F6S2wwA7fgynh9gWSw==",
       "dev": true,
       "requires": {
         "extend-shallow": "^2.0.1",
@@ -6043,9 +6202,9 @@
       "dev": true
     },
     "spdx-correct": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.0.0.tgz",
-      "integrity": "sha512-N19o9z5cEyc8yQQPukRCZ9EUmb4HUpnrmaL/fxS2pBo2jbfcFRVuFZ/oFC+vZz0MNNk0h80iMn5/S6qGZOL5+g==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.0.tgz",
+      "integrity": "sha512-lr2EZCctC2BNR7j7WzJ2FpDznxky1sjfxvvYEyzxNyb6lZXHODmEoJeFu4JupYlkfha1KZpJyoqiJ7pgA1qq8Q==",
       "dev": true,
       "requires": {
         "spdx-expression-parse": "^3.0.0",
@@ -6053,9 +6212,9 @@
       }
     },
     "spdx-exceptions": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.1.0.tgz",
-      "integrity": "sha512-4K1NsmrlCU1JJgUrtgEeTVyfx8VaYea9J9LvARxhbHtVtohPs/gFGG5yy49beySjlIMhhXZ4QqujIZEfS4l6Cg==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.2.0.tgz",
+      "integrity": "sha512-2XQACfElKi9SlVb1CYadKDXvoajPgBVPn/gOQLrTvHdElaVhr7ZEbqJaRnJLVNeaI4cMEAgVCeBMKF6MWRDCRA==",
       "dev": true
     },
     "spdx-expression-parse": {
@@ -6069,9 +6228,9 @@
       }
     },
     "spdx-license-ids": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.1.tgz",
-      "integrity": "sha512-TfOfPcYGBB5sDuPn3deByxPhmfegAhpDYKSOXZQN81Oyrrif8ZCodOLzK3AesELnCx03kikhyDwh0pfvvQvF8w==",
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.5.tgz",
+      "integrity": "sha512-J+FWzZoynJEXGphVIS+XEh3kFSjZX/1i9gFBaWQcB+/tmpe2qUsSBABpcxqxnAxFdiUFEgAX1bjYGQvIZmoz9Q==",
       "dev": true
     },
     "split-string": {
@@ -6107,9 +6266,9 @@
       }
     },
     "stack-utils": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/stack-utils/-/stack-utils-1.0.1.tgz",
-      "integrity": "sha1-1PM6tU6OOHeLDKXP07OvsS22hiA=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/stack-utils/-/stack-utils-1.0.2.tgz",
+      "integrity": "sha512-MTX+MeG5U994cazkjd/9KNAapsHnibjMLnfXodlkXw76JEea0UiNzrqidzo1emMwk7w5Qhc9jd4Bn9TBb1MFwA==",
       "dev": true
     },
     "static-extend": {
@@ -6185,6 +6344,26 @@
         "strip-ansi": "^4.0.0"
       }
     },
+    "string.prototype.trimleft": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimleft/-/string.prototype.trimleft-2.1.0.tgz",
+      "integrity": "sha512-FJ6b7EgdKxxbDxc79cOlok6Afd++TTs5szo+zJTUyow3ycrRfJVE2pq3vcN53XexvKZu/DJMDfeI/qMiZTrjTw==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "function-bind": "^1.1.1"
+      }
+    },
+    "string.prototype.trimright": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimright/-/string.prototype.trimright-2.1.0.tgz",
+      "integrity": "sha512-fXZTSV55dNBwv16uw+hh5jkghxSnc5oHq+5K/gXgizHwAvMetdAJlHqqoFC1FSDVPYWLkAKl2cxpUT41sV7nSg==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "function-bind": "^1.1.1"
+      }
+    },
     "string_decoder": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
@@ -6242,9 +6421,9 @@
       }
     },
     "symbol-tree": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.2.tgz",
-      "integrity": "sha1-rifbOPZgp64uHDt9G8KQgZuFGeY=",
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.4.tgz",
+      "integrity": "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==",
       "dev": true
     },
     "table": {
@@ -6552,38 +6731,15 @@
       }
     },
     "union-value": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
-      "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
       "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "get-value": "^2.0.6",
         "is-extendable": "^0.1.1",
-        "set-value": "^0.4.3"
-      },
-      "dependencies": {
-        "extend-shallow": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
-          "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
-          "dev": true,
-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        },
-        "set-value": {
-          "version": "0.4.3",
-          "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
-          "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
-          "dev": true,
-          "requires": {
-            "extend-shallow": "^2.0.1",
-            "is-extendable": "^0.1.1",
-            "is-plain-object": "^2.0.1",
-            "to-object-path": "^0.3.0"
-          }
-        }
+        "set-value": "^2.0.1"
       }
     },
     "universalify": {
@@ -6738,7 +6894,7 @@
       "dependencies": {
         "minimist": {
           "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
           "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
           "dev": true
         }
@@ -6751,18 +6907,18 @@
       "dev": true
     },
     "whatwg-encoding": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.4.tgz",
-      "integrity": "sha512-vM9KWN6MP2mIHZ86ytcyIv7e8Cj3KTfO2nd2c8PFDqcI4bxFmQp83ibq4wadq7rL9l9sZV6o9B0LTt8ygGAAXg==",
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
+      "integrity": "sha512-b5lim54JOPN9HtzvK9HFXvBma/rnfFeqsic0hSpjtDbVxR3dJKLc+KB4V6GgiGOvl7CY/KNh8rxSo9DKQrnUEw==",
       "dev": true,
       "requires": {
-        "iconv-lite": "0.4.23"
+        "iconv-lite": "0.4.24"
       }
     },
     "whatwg-mimetype": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.2.0.tgz",
-      "integrity": "sha512-5YSO1nMd5D1hY3WzAQV3PzZL83W3YeyR1yW9PcH26Weh1t+Vzh9B6XkDh7aXm83HBZ4nSMvkjvN2H2ySWIvBgw==",
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",
+      "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g==",
       "dev": true
     },
     "whatwg-url": {
@@ -6809,7 +6965,7 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {
@@ -6864,9 +7020,9 @@
       }
     },
     "write-file-atomic": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.3.0.tgz",
-      "integrity": "sha512-xuPeK4OdjWqtfi59ylvVL0Yn35SF3zgcAcv7rBPFHVaEapaDr4GdGgm3j7ckTwH9wHL7fGmgfAnb0+THrHb8tA==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.1.11",
@@ -6901,23 +7057,17 @@
       "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
       "dev": true
     },
-    "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
-      "dev": true
-    },
     "yargs": {
-      "version": "11.1.0",
-      "resolved": "http://registry.npmjs.org/yargs/-/yargs-11.1.0.tgz",
-      "integrity": "sha512-NwW69J42EsCSanF8kyn5upxvjp5ds+t3+udGBeTbFnERA+lF541DDpMawzo4z6W/QrzNM18D+BPMiOBibnFV5A==",
+      "version": "11.1.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-11.1.1.tgz",
+      "integrity": "sha512-PRU7gJrJaXv3q3yQZ/+/X6KBswZiaQ+zOmdprZcouPYtQgvNU35i+68M4b1ZHLZtYFT5QObFLV+ZkmJYcwKdiw==",
       "dev": true,
       "requires": {
         "cliui": "^4.0.0",
         "decamelize": "^1.1.1",
         "find-up": "^2.1.0",
         "get-caller-file": "^1.0.1",
-        "os-locale": "^2.0.0",
+        "os-locale": "^3.1.0",
         "require-directory": "^2.1.1",
         "require-main-filename": "^1.0.1",
         "set-blocking": "^2.0.0",
diff --git a/tests/syslog.test.js b/tests/syslog.test.js
index 76072c1..5e96423 100644
--- a/tests/syslog.test.js
+++ b/tests/syslog.test.js
@@ -4,88 +4,96 @@ const udp = require('dgram');
 const net = require('net');
 const tls = require('tls');
 const fs = require('fs');
-const dns = require('dns');
-let dnsPromises = dns.promises;
+
+const noop = () => {};
+let udpServer;
+let tcpServer;;
+let tlsBasicServer;
+let tlsAuthServer;
 
 function setupServers () {
-  return new Promise ((resolve, reject) => {
-    // Load a UDP server
-    // global.udpServerPort = 8000;
-    this.udpServer = udp.createSocket('udp4');
-    this.udpServer.bind(global.udpServerPort, () => {
-      // console.log('UDP server running on', global.udpServerPort);
-    });
-    
-    // Load a TCP server
-    // global.tcpServerPort = 8001;
-    this.tcpServer = net.createServer((socket) => {
-      socket.on('data', function (data) {});
-      socket.on('end', function () {});
-    });
-    this.tcpServer.listen(global.tcpServerPort, () => {
-      // console.log('TCP server running on', global.tcpServerPort);
-    });
-    
-    // Load a basic TLS 
-    // global.tlsBasicServerPort = 8002;
-    const tlsBasicServerOptions = {
-      key: fs.readFileSync('./tests/jest_test_server_key.pem'),
-      cert: fs.readFileSync('./tests/jest_test_server_cert.pem'),
-      handshakeTimeout: 100,
-      requestCert: false,
-      rejectUnauthorized: false
-    };
-    this.tlsBasicServer = tls.createServer(tlsBasicServerOptions, (socket) => {
-      socket.on('data', function (data) {});
-      socket.on('end', function() {}); 
-    });
-    this.tlsBasicServer.listen(global.tlsBasicServerPort, () => {
-      // console.log('TLS basic server running on', global.tlsBasicServerPort);
-    });
-    
-    // Load a TLS server with client Cert request
-    // global.tlsAuthServerPort = 8003;
-    const tlsAuthServerOptions = {
-      key: fs.readFileSync('./tests/jest_test_server_key.pem'),
-      cert: fs.readFileSync('./tests/jest_test_server_cert.pem'),
-      ca: [ fs.readFileSync('./tests/jest_test_client_cert.pem') ],
-      handshakeTimeout: 100,
-      requestCert: true,
-      rejectUnauthorized: true
-    };
-    this.tlsAuthServer = tls.createServer(tlsAuthServerOptions, (socket) => {
-      socket.on('data', function (data) {});
-      socket.on('end', function() {}); 
-    });
-    this.tlsAuthServer.listen(global.tlsAuthServerPort, () => {
-      // console.log('TLS auth server running on', global.tlsAuthServerPort);
-    });
-  });
+  return Promise.all([
+    new Promise ((resolve, reject) => {
+      // Load a UDP server
+      // global.udpServerPort = 8000;
+      udpServer = udp.createSocket('udp6');
+      udpServer.bind(global.udpServerPort, resolve);
+      udpServer.on('error', reject);
+    }),
+
+    new Promise ((resolve, reject) => {
+      // Load a TCP server
+      // global.tcpServerPort = 8001;
+      tcpServer = net.createServer((socket) => {
+        socket.on('data', function (data) {});
+        socket.on('end', function () {});
+      });
+      tcpServer.listen(global.tcpServerPort, resolve);
+      tcpServer.on('error', reject);
+    }),
+
+    new Promise ((resolve, reject) => {
+      // Load a basic TLS
+      // global.tlsBasicServerPort = 8002;
+      const tlsBasicServerOptions = {
+        key: fs.readFileSync('./tests/jest_test_server_key.pem'),
+        cert: fs.readFileSync('./tests/jest_test_server_cert.pem'),
+        handshakeTimeout: 100,
+        requestCert: false,
+        rejectUnauthorized: false
+      };
+      tlsBasicServer = tls.createServer(tlsBasicServerOptions, (socket) => {
+        socket.on('data', function (data) {});
+        socket.on('end', function() {});
+      });
+      tlsBasicServer.listen(global.tlsBasicServerPort, resolve);
+      tlsBasicServer.on('error', reject);
+    }),
+
+    new Promise ((resolve, reject) => {
+      // Load a TLS server with client Cert request
+      // global.tlsAuthServerPort = 8003;
+      const tlsAuthServerOptions = {
+        key: fs.readFileSync('./tests/jest_test_server_key.pem'),
+        cert: fs.readFileSync('./tests/jest_test_server_cert.pem'),
+        ca: [ fs.readFileSync('./tests/jest_test_client_cert.pem') ],
+        handshakeTimeout: 100,
+        requestCert: true,
+        rejectUnauthorized: true
+      };
+      tlsAuthServer = tls.createServer(tlsAuthServerOptions, (socket) => {
+        socket.on('data', function (data) {});
+        socket.on('end', function() {});
+      });
+      tlsAuthServer.listen(global.tlsAuthServerPort, resolve);
+      tlsAuthServer.on('error', reject);
+    })
+  ]);
 }
 
 function teardownServers() {
-  return new Promise ((resolve, reject) => {
-    this.udpServer.close(() => {
-      // console.log('UDP server closed');
-    });
-    this.tcpServer.close(() => {
-      // console.log('TCP server closed');
-    });
-    this.tlsBasicServer.close(() => {
-      // console.log('TLS basic server closed');
-    });
-    this.tlsAuthServer.close(() => {
-      // console.log('TLS auth server closed');
-    });
-  });
+  return Promise.all([
+    new Promise((resolve) => {
+      udpServer.close(resolve);
+    }),
+    new Promise((resolve) => {
+      tcpServer.close(resolve);
+    }),
+    new Promise((resolve) => {
+      tlsBasicServer.close(resolve);
+    }),
+    new Promise((resolve) => {
+      tlsAuthServer.close(resolve);
+    })
+  ]);
 }
 
-beforeAll(() => {
-  setupServers().then((result => {}));
+beforeAll(async () => {
+  await setupServers();
 });
 
-afterAll(() => {
-  teardownServers().then((result => {}));
+afterAll(async () => {
+  await teardownServers();
 });
 
 // CEF Class Tests
@@ -154,14 +162,16 @@ describe('CEF Class Tests', () => {
       {
         extensions: {
           deviceAction: 'block'
+        },
+        server: {
+          target: '::1',
+          port:global.udpServerPort
         }
       }
     );
     let result = cef.validate();
-    result = await cef.send({
-      target: '::1',
-      port:global.udpServerPort
-    });
+    result = await cef.send();
+    await cef.close();
     let validateMsg = 'CEF:0|Unknown|Unknown|Unknown|Unknown|Unknown';
     validateMsg += '|Unknown|deviceAction=block ';
     expect(result).toBe(validateMsg);
@@ -175,9 +185,10 @@ describe('CEF Class Tests', () => {
     let cef = new SyslogPro.CEF({
       server: syslog
     });
+    syslog.on('error', noop);
     expect.assertions(1);
     try {
-      await cef.send({});
+      await cef.send();
     } catch (reason) {
       expect(reason.message).toBe('connect ECONNREFUSED 127.0.0.1:8101');
     }
@@ -203,6 +214,7 @@ describe('LEEF Class Tests', () => {
       },
       server: syslog
     });
+    syslog.on('error', noop);
     expect.assertions(1);
     try {
       await leef.send();
@@ -213,6 +225,7 @@ describe('LEEF Class Tests', () => {
   test('LEEF Send', async () => {
     let leef = new SyslogPro.LEEF();
     const result = await leef.send();
+    await leef.close();
     expect(result).toBe('LEEF:2.0|unknown|unknown|unknown|unknown|');
   });
   test('LEEF Send with Auth TLS options', async () => {
@@ -228,6 +241,7 @@ describe('LEEF Class Tests', () => {
     });
     expect.assertions(1);
     const result = await leef.send();
+    await leef.close();
     expect(result).toBe('LEEF:2.0|unknown|unknown|unknown|unknown|');
   });
 });
@@ -235,32 +249,46 @@ describe('LEEF Class Tests', () => {
 // RFC5424 Class Test
 describe('RFC5424 Class Tests', () => {
   test('RFC5424 Sending critical - debug Severity Messages', async () => {
-    let rfc5424 = new SyslogPro.RFC5424();
-    let result = await rfc5424.debug('test')
-    expect(result).toMatch(/<191>1 /);
-    result = await rfc5424.log('test');
-    expect(result).toMatch(/<190>1 /);
-    result = await rfc5424.info('test');
-    expect(result).toMatch(/<190>1 /);
-    result = await rfc5424.note('test');
-    expect(result).toMatch(/<189>1 /);
-    result = await rfc5424.warn('test');
-    expect(result).toMatch(/<188>1 /);
-    result = await rfc5424.err('test');
-    expect(result).toMatch(/<187>1 /);
-    result = await rfc5424.crit('test');
-    expect(result).toMatch(/<186>1 /);
+    const rfc5424 = new SyslogPro.RFC5424({
+      server: {
+        port: global.udpServerPort
+      }
+    });
+    try {
+      let result = await rfc5424.debug('test')
+      expect(result).toMatch(/<191>1 /);
+      result = await rfc5424.log('test');
+      expect(result).toMatch(/<190>1 /);
+      result = await rfc5424.info('test');
+      expect(result).toMatch(/<190>1 /);
+      result = await rfc5424.note('test');
+      expect(result).toMatch(/<189>1 /);
+      result = await rfc5424.warn('test');
+      expect(result).toMatch(/<188>1 /);
+      result = await rfc5424.err('test');
+      expect(result).toMatch(/<187>1 /);
+      result = await rfc5424.crit('test');
+      expect(result).toMatch(/<186>1 /);
+    } finally {
+      await rfc5424.close();
+    }
   });
   test('RFC5424 Sending emergency - alert Severity Messages', async () => {
-    let syslog = new SyslogPro.Syslog();
+    let syslog = new SyslogPro.Syslog({
+      port: global.udpServerPort
+    });
     let rfc5424 = new SyslogPro.RFC5424({
       server: syslog
     });
     expect.assertions(2);
-    let result = await rfc5424.alert('test')
-    expect(result).toMatch(/<185>1 /);
-    result = await rfc5424.emer('test')
-    expect(result).toMatch(/<184>1 /);
+    try {
+      let result = await rfc5424.alert('test')
+      expect(result).toMatch(/<185>1 /);
+      result = await rfc5424.emer('test')
+      expect(result).toMatch(/<184>1 /);
+    } finally {
+      await rfc5424.close();
+    }
   });
   test('RFC5424 Send with a bad message type ERROR', async () => {
     let rfc5424 = new SyslogPro.RFC5424();
@@ -295,6 +323,7 @@ describe('RFC5424 Class Tests', () => {
         protocol: 'tcp'
       }
     });
+    rfc5424.server.on('error', noop);
     expect.assertions(1);
     try {
       await rfc5424.send('hello');
@@ -552,22 +581,30 @@ describe('RFC5424 Class Tests', () => {
 // RFC3164 Class Test
 describe('RFC3164 Class Tests', () => {
   test('RFC3164 Sending critical - debug Severity Messages', async () => {
-    let rfc3164 = new SyslogPro.RFC3164();
+    let rfc3164 = new SyslogPro.RFC3164({
+      server: {
+        port: global.udpServerPort
+      }
+    });
     expect.assertions(7);
-    let result = await rfc3164.debug('test');
-    expect(result).toMatch(/<191>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.log('test');
-    expect(result).toMatch(/<190>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.info('test');
-    expect(result).toMatch(/<190>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.note('test');
-    expect(result).toMatch(/<189>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.warn('test');
-    expect(result).toMatch(/<188>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.err('test');
-    expect(result).toMatch(/<187>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.crit('test')
-    expect(result).toMatch(/<186>J|F|M|A|S|O|N|D/);
+    try {
+      let result = await rfc3164.debug('test');
+      expect(result).toMatch(/<191>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.log('test');
+      expect(result).toMatch(/<190>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.info('test');
+      expect(result).toMatch(/<190>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.note('test');
+      expect(result).toMatch(/<189>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.warn('test');
+      expect(result).toMatch(/<188>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.err('test');
+      expect(result).toMatch(/<187>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.crit('test')
+      expect(result).toMatch(/<186>J|F|M|A|S|O|N|D/);
+    } finally {
+      await rfc3164.close();
+    }
   });
   test('RFC3164 Sending TCP emergency - alert Severity Messages', async () => {
     let syslog = new SyslogPro.Syslog({
@@ -577,10 +614,14 @@ describe('RFC3164 Class Tests', () => {
     let rfc3164 = new SyslogPro.RFC3164({
       server: syslog
     });
-    let result = await rfc3164.alert('test');
-    expect(result).toMatch(/<185>J|F|M|A|S|O|N|D/);
-    result = await rfc3164.emer('test');
-    expect(result).toMatch(/<184>J|F|M|A|S|O|N|D/);
+    try {
+      let result = await rfc3164.alert('test');
+      expect(result).toMatch(/<185>J|F|M|A|S|O|N|D/);
+      result = await rfc3164.emer('test');
+      expect(result).toMatch(/<184>J|F|M|A|S|O|N|D/);
+    } finally {
+      await rfc3164.close();
+    }
   });
   test('RFC3164 Send with a bad message type ERROR', async () => {
     let rfc3164 = new SyslogPro.RFC3164();
@@ -611,6 +652,7 @@ describe('RFC3164 Class Tests', () => {
         protocol: 'tcp'
       }
     });
+    rfc3164.server.on('error', noop);
     expect.assertions(1);
     try {
       await rfc3164.send('hello');
@@ -760,11 +802,14 @@ describe('Base Syslog Class tests', () => {
       protocol: 'udp',
       port: global.udpServerPort
     });
+    syslog.on('error', noop);
     expect.assertions(1);
     try {
       await syslog.send('test');
     } catch(reason) {
       expect(reason.message).toBe('getaddrinfo ENOTFOUND noteareal.dns');
+    } finally {
+      await syslog.close();
     }
   });
   test('Syslog Send UDP with bad message type Error', async () => {
@@ -788,6 +833,7 @@ describe('Base Syslog Class tests', () => {
       port: global.udpServerPort
     });
     const result = await syslog.send('test');
+    await syslog.close();
     expect(result).toBe('test');
   });
   test('Syslog Send TLS with timeout Error', async () => {
@@ -861,6 +907,7 @@ describe('Base Syslog Class tests', () => {
       target: 'cloud.positon.org',  // Public test server
     });
     const result = await syslog.send('test');
+    await syslog.close();
     expect(result).toBe('test');
   });
   test('Syslog Send TLS without rejectUnauthorized', async () => {
@@ -870,6 +917,7 @@ describe('Base Syslog Class tests', () => {
       rejectUnauthorized: false
     });
     const result = await syslog.send('test');
+    await syslog.close();
     expect(result).toBe('test');
   });
   test('Syslog Send TCP with DNS Error', async () => {
@@ -879,6 +927,7 @@ describe('Base Syslog Class tests', () => {
       port: global.tcpServerPort
     });
     expect.assertions(1);
+    syslog.on('error', noop);
     try {
       await syslog.send('test');
     } catch(reason) {